ControllerCancelCallback typedef

ControllerCancelCallback = FutureOr<void> Function()

Тип обратных вызовов onCancel контроллера потока.

Реализация

typedef FutureOr<void> ControllerCancelCallback();

© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.19.6/dart-async/ControllerCancelCallback.html